.modifynum_3Q {
    width: 100%;
    max-width: 800px;
    min-width: 320px;
    margin: 0;
    background-color: #f1f1f1;
}

/* 标题 */
.coupons_title {
    background-color: #fff;
    font-size: 16px;
    font-weight: 550;
    text-align: center;
    color: #5C5450;
}

/* 手机号和验证码 */
.modify_num {
    background-color: #fff;
    width: 100%;
    display: flex;
    align-items: center;
    margin-top: 10px;
    padding-left: 20px;
}

.mnum_title {
    font-size: 16px;
    color: #322926;
    margin-right: 15px;
}

.mnum_input {
    border: none;
    font-size: 14px;
}

.mnum_getcode {
    width: 25%;
    height: 66%;
    border-radius: 6px;
    background-color: #322926;
    font-size: 16px;
    color: #fff;
    border: none;
}

.num_code {
    margin-top: 5px;
    overflow: hidden;
}

.confirm_btn {
    width: 90%;
    background-color: #322926;
    font-size: 16px;
    color: #fff;
    border: none;
    border-radius: 6px;
    margin: 20px 5% 0;
}